612856027681 has 8 divisors (see below), whose sum is σ = 651568017600. Its totient is φ = 575149544112.

The previous prime is 612856027661. The next prime is 612856027703. The reversal of 612856027681 is 186720658216.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 612856027681 - 2³⁹ = 63100213793 is a prime.

It is a super-2 number, since 2×612856027681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612856027661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251375331 + ... + 251377768.

It is an arithmetic number, because the mean of its divisors is an integer number (81446002200).

Almost surely, 2^612856027681 is an apocalyptic number.

It is an amenable number.

612856027681 is a deficient number, since it is larger than the sum of its proper divisors (38711989919).

612856027681 is a wasteful number, since it uses less digits than its factorization.

612856027681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502753175.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 612856027681 in words is "six hundred twelve billion, eight hundred fifty-six million, twenty-seven thousand, six hundred eighty-one".